Patent US3499058A successfully refreshed from Google Patents.
US3499058A
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US
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Mixture of two polyesters with pyromellitic dianhydride
Assignee: United States Department of the Navy
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Filing: 1966-04-22
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Granted: 1970-03-03
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Expires: 1986-04-22
Abstract
No abstract record available.
Inventors
- 👤 Martin H Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:55
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4244; C08G18/4247; C08G18/425; C08G18/4263; C08G18/67; C08G18/68; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08G63/66; C08G63/668; C08G63/672; C08G63/91; C08G63/914; C08G63/916; C08L; C08L67/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3042650A
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US3242142A
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US3196131A
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US3345339A
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US3397254A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |